/**
 * Copyright (C) 2009, 2010 SC 4ViewSoft SRL
 *  
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.achartengine.chartdemo.demo.chart;

import java.util.ArrayList;
import java.util.List;

import org.achartengine.ChartFactory;
import org.achartengine.chart.PointStyle;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;

import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Typeface;

/**
 * Sales comparison demo chart.
 */
public class SalesComparisonChart extends AbstractChart
{
	/**
	 * Returns the chart name.
	 * 
	 * @return the chart name
	 */
	public String getName()
	{
		return "Sales comparison";
	}

	/**
	 * Returns the chart description.
	 * 
	 * @return the chart description
	 */
	public String getDesc()
	{
		return "Monthly sales advance for 2 years (line and area charts)";
	}

	/**
	 * Executes the chart demo.
	 * 
	 * @param context the context
	 * @return the built intent
	 */
	public Intent execute(Context context)
	{
		String[] titles = new String[] { "Sales for 2008", "Sales for 2007",
				"Difference between 2008 and 2007 sales" };
		List<double[]> values = new ArrayList<double[]>();
		values.add(new double[] { 14230, 12300, 14240, 15244, 14900, 12200,
				11030, 12000, 12500, 15500, 14600, 15000 });
		values.add(new double[] { 10230, 10900, 11240, 12540, 13500, 14200,
				12530, 11200, 10500, 12500, 11600, 13500 });
		int length = values.get(0).length;
		double[] diff = new double[length];
		for (int i = 0; i < length; i++)
		{
			diff[i] = values.get(0)[i] - values.get(1)[i];
		}
		values.add(diff);
		int[] colors = new int[] { Color.BLUE, Color.CYAN, Color.GREEN };
		PointStyle[] styles = new PointStyle[] { PointStyle.POINT,
				PointStyle.POINT, PointStyle.POINT };
		XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);
		setChartSettings(renderer, "Monthly sales in the last 2 years",
				"Month", "Units sold", 0.75, 12.25, -5000, 19000,
				Color.GRAY, Color.LTGRAY);
		renderer.setXLabels(12);
		renderer.setYLabels(10);
		renderer.setDisplayChartValues(true);
		renderer.setChartTitleTextSize(14);
		renderer.setTextTypeface("sans_serif", Typeface.BOLD);
		renderer.setChartValuesTextSize(7.5f);
		renderer.setLabelsTextSize(9.5f);
		renderer.setAxisTitleTextSize(12);
		renderer.setLegendTextSize(11);
		length = renderer.getSeriesRendererCount();
		for (int i = 0; i < length; i++)
		{
			XYSeriesRenderer seriesRenderer = (XYSeriesRenderer) renderer
					.getSeriesRendererAt(i);
			seriesRenderer.setFillBelowLine(i == length - 1);
			seriesRenderer.setFillBelowLineColor(colors[i]);
			seriesRenderer.setLineWidth(2.5f);
		}
		return ChartFactory.getLineChartIntent(context, buildBarDataset(
				titles, values), renderer);
	}

}
